Authenticated Quantum Secure Direct Communication with Qutrits

In this paper, a novel authenticated quantum secure direct communication scheme with three-dimension single photons is presented, where the message is encoded on batches of qutrits, and identity is mutual authenticated with their shared seed key. Security analysis shows that this scheme can efficiently resist Eve´s attacks and the impersonator´s attacks. Comparing with those protocols using entangled state, the presented scheme is more practical and economic within the present technology.